Carb sizes

[richkel]

Hi Gang, another newby question. While cleaning the carbs (CV type) on my 82 GS850GL I measured the bore (engine side) and got pretty close to 32mm. I had the carbs off my buddy's 81 GS750 and the bores measured close to 34mm. Can that be correct? Another fellow I talked to said his 850 had 32mm carbs too.

thanks

Rich

[Steve]

Owners have been known to change things around, but all the Fours from 550 through 850, from '80 on, came from the factory with BS32SS carbs.
The 1000 and 1100s came with BS34SS, the 1150 came with BS36SS.

.

[richkel]

Thanks Steeve for the carb info and muffler pic. Very helpful.

Rich

[ben2go]

Some think that the 34mm carbs from the big bikes(1000/1100) are an upgrade.I guess they would be on a bike with engine mods.On a stock engine,I really don't think it does more than cause a bunch of headaches trying to tune them.